[Xen-users] guest kernel portability

[Tim Freeman <tfreeman@xxxxxxxxxxx>]

What guarantees are made about the interface between guest kernels and the
hypervisor/domain0 from Xen version to version?  (domain loading, hypercalls,
front/back device drivers, etc.)   

Does a certain minor/sub-version equality guarantee compatibility?  Are there
instead any known version compatibilities/incompatibilities?

Sorry if this has been addressed recently, and pointers would be much
appreciated.

For some background, we may want to allow authorized guests to bring their
specialized kernels with them and I'm trying to ascertain what kind of structure
we can put around the process (this is for the Globus Workspace Service, where
such a (signed) kernel image could be an authorized thing to bring with a guest
image).

Thanks,
Tim 



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